Here is a sample of maps I made using Leaflet to represent different data sets in R.
First, I loaded in COVID-19 data from the New York Times. I filtered this data to show the specified date, which is the day the US surpassed 1million deaths due to COVID-19. Then I input this filtered data into a leaflet map, and added colors and the interactive stats which show up when you hover over a specific state. Finally, I added a map legend.
The following map expresses data of real estate sales in Sacramento. Using leaflet, I added circles whose size corresponds to the price of the real estate sale in that particular latitude and longitude location.